#include <system_data_cells.h>
#include <ipl.h>
#include <internals.h>
#include <pridef.h>
#include <wqhdef.h>
#include <linux/sched.h>
#include <ipldef.h>
#include <sch_routines.h>
#include <linux/spinlock.h>
#include <mtxdef.h>
#include <asm/bitops.h>
#include <statedef.h>
#include <queue.h>
Go to the source code of this file.
Defines | |
| #define | ioc_gq_mutex ioc_spin |
Functions | |
| void | mutexwait (struct _pcb *p, struct _mtx *m) |
| stall process when waiting for mutex - see 5.2 8.5.3 | |
| void | sch_lockw (struct _mtx *m) |
| mutex for writing - see 5.2 8.5.2 | |
| void | sch_lockr (struct _mtx *m) |
| mutex for reading - see 5.2 8.5.1 | |
| void | sch_iolockw (void) |
| void | sch_unlock (struct _mtx *m) |
| unlocking a mutex - see 5.2 8.5.4 | |
| void | sch_unlockw (struct _mtx *m) |
| void | sch_iounlockw (void) |
| void | sch_iounlock (void) |
| void | sch_std_ravail (int rsn) |
| resource available | |
| void | sch_rwait (int rsn) |
Definition in file mutex.c.
| #define ioc_gq_mutex ioc_spin |
| void mutexwait | ( | struct _pcb * | p, | |
| struct _mtx * | m | |||
| ) |
stall process when waiting for mutex - see 5.2 8.5.3
| p | pcb | |
| m | mutex |
store mutex address in efwm
new pcb state MWAIT
insert into MWAIT scheduling queue
put on wait
Definition at line 37 of file mutex.c.
References sch_aq_wqhdr, and sch_waitl().
Referenced by sch_lockr(), sch_lockw(), and sch_rwait().
| void sch_iolockw | ( | void | ) |
Definition at line 140 of file mutex.c.
References sch_lockw().
Referenced by exe_assign(), exe_crembx(), and exe_dassgn().
| void sch_iounlock | ( | void | ) |
Definition at line 203 of file mutex.c.
References sch_unlockw().
Referenced by exe_assign(), and exe_dassgn().
| void sch_iounlockw | ( | void | ) |
| void sch_lockr | ( | struct _mtx * | m | ) |
mutex for reading - see 5.2 8.5.1
| m | mutex |
spinlock sched
test mutex write flag
if set, stall process until available
if not set, grant readership
TODO check owncnt use here. copied from lockw?
own it is done by incrementing owncnt and mtxcnt
if it is the first to be locked
then record current priorities in pcb
TODO check if saved right with regard to realtime
if not realtime process, boost priority
release spinlock
Definition at line 100 of file mutex.c.
References _pcb, ctl_gl_pcb, IPL__ASTDEL, IPL__SCHED, _mtx::mtx_w_owncnt, mutexwait(), sch_change_cur_priority(), and SPIN_SCHED.
| void sch_lockw | ( | struct _mtx * | m | ) |
mutex for writing - see 5.2 8.5.2
| m | mutex |
spinlock sched
test and set mutex write flag
if set, no further readers or writers allowed, stall process
if no other owners
own it is done by incrementing owncnt and mtxcnt
if it is the first to be locked
then record current priorities in pcb
TODO check if saved right with regard to realtime
if not realtime process, boost priority
if other owners, stall
release spinlock
Definition at line 55 of file mutex.c.
References _pcb, ctl_gl_pcb, IPL__ASTDEL, IPL__SCHED, _mtx::mtx_w_owncnt, mutexwait(), sch_change_cur_priority(), and SPIN_SCHED.
Referenced by lnm_lock(), lnm_lockr(), lnm_lockw(), and sch_iolockw().
| void sch_rwait | ( | int | rsn | ) |
| void sch_std_ravail | ( | int | rsn | ) |
resource available
Definition at line 212 of file mutex.c.
References _pcb, IPL__MAILBOX, sch_chse(), sch_gl_resmask, sch_gq_mwait, SPIN_SCHED, _wqh::wqh_l_wqcnt, and _wqh::wqh_l_wqfl.
Referenced by bufpost(), and create_fork_thread().
| void sch_unlock | ( | struct _mtx * | m | ) |
unlocking a mutex - see 5.2 8.5.4
| m | mutex |
spinlock sched
decrement mtxcnt
if process does not own anymore, restore pris and change pri
TODO check if all saved are restore, and TODO check realtime
decrement owncnt
if no other owners
bbcci, test and clear write bit
if a writer had it
scan misc wait queue
search for those waiting for the now unlocked mutex
when found
decrease wqueue count
schedule that process
release spinlock
Definition at line 150 of file mutex.c.
References _pcb, ctl_gl_pcb, IPL__SCHED, _mtx::mtx_w_owncnt, sch_change_cur_priority(), sch_chse(), sch_gq_mwait, SPIN_SCHED, _wqh::wqh_l_wqcnt, and _wqh::wqh_l_wqfl.
Referenced by sch_unlockw().
| void sch_unlockw | ( | struct _mtx * | m | ) |
Definition at line 194 of file mutex.c.
References sch_unlock().
Referenced by lnm_unlock(), lnm_unlockr(), lnm_unlockw(), sch_iounlock(), and sch_iounlockw().
1.5.5